Direct Entra External flow to the 'Sign up (Create User)'. Query parameters 'screen_hint=signup' and 'prompt=create have stopped working.

Question

We are trying to redirect the standard Entra External Sign In / Sign Up flow to the 'Sign up (Create User)' page via a URL query parameter (or other technique if possible).  We have seen documentation online suggesting that adding the query parameter 'screen_hint=signup' or 'prompt=create' will achieve our goal of directing the user directly to the sign up page. 

We previously used prompt=create and it worked.  However recently it seems to have stopped working. Do you have any suggestions about how to achieve this goal?  Additionally, can you tell us why prompt=create stopped working? Kind regards,

Answer 1

The issue you're experiencing with the prompt=create parameter not working as expected may be related to changes in the Microsoft Entra External ID authentication flow. As of the current documentation, the supported prompt values include create, which is intended to trigger a sign-up dialog for external users. However, if this functionality has stopped working, it could be due to recent updates or changes in the Microsoft Entra service that have not been documented yet.

To achieve the goal of redirecting users directly to the sign-up page, ensure that you are using the correct syntax for the URL parameters. Additionally, consider checking any recent updates from Microsoft regarding the Entra External ID service, as these may provide insights into changes affecting the prompt behavior.

If the prompt=create is not functioning, you might also want to explore the possibility of using the screen_hint=signup parameter, as it has been suggested in documentation for similar purposes. However, if both parameters are failing, it may be necessary to reach out to Microsoft support for clarification on the current behavior of these parameters and any potential workarounds.

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References:

• Prompt behavior with MSAL.js
• API reference for sign-up